/**
 * CPAR TOOLKIT - Compiler and Runtime for CPAR
 * Copyright (C) 2012 CPAR TOOLKIT Project Developers
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
#include <windows.h>
#include "cpar.h"

struct CPAREvent
{
  HANDLE        hdl;
  CPARAllocator *allocator;
  long          listenerIdx;
};

static
void
CPAREventAllocatorListener( CPARAllocator *allocator, void *data)
{
  CPAREvent *event;

  event = (CPAREvent*)data;
  CloseHandle(event->hdl);
}

long CPAREventCreate( CPARAllocator *allocator, CPAREvent **p )
{
  CPAREvent *event;

  event = (CPAREvent*) CPARAllocatorAlloc(allocator,sizeof(CPAREvent));
  if(NULL == event)
    return CPAR_E_NO_MEMORY;

  event->hdl = CreateEvent(NULL, TRUE, FALSE, NULL);
  if(INVALID_HANDLE_VALUE == event->hdl)
  {
    CPARAllocatorFree(allocator, event);
    return CPAR_E_GENERAL;
  }

  event->allocator    = allocator;
  event->listenerIdx  = CPARAllocatorDestroyListenerAdd(allocator, CPAREventAllocatorListener, event);

  *p = event;

  return CPAR_SUCCESS;
}

void CPAREventDestroy( CPAREvent *event )
{
  CloseHandle(event->hdl);
  CPARAllocatorDestroyListenerRemove(event->allocator, event->listenerIdx);
  CPARAllocatorFree(event->allocator, event);
}

void CPAREventSet( CPAREvent *event )
{
  SetEvent(event->hdl);
}

void CPAREventReset( CPAREvent *event )
{
  ResetEvent(event->hdl);
}

void CPAREventWait( CPAREvent *event )
{
  WaitForSingleObject(event->hdl,INFINITE);
}

long CPAREventTryWait( CPAREvent *event, long milliseconds )
{
  return WaitForSingleObject(event->hdl, milliseconds) == WAIT_OBJECT_0;
}

long CPAREventIsSet( CPAREvent *event )
{
  return CPAREventTryWait(event,0);
}
